In a survey conducted by CBS News in 2005, it was found that 48 percent of Americans believed in ghosts. Other surveys have put the number at anywhere from around 20 to over 50 percent. While such figures certainly don't imply that ghosts are real, they do suggest that belief in them is relatively common. When someone does suspect that a ghost is present in their home or business, they will sometimes call in "experts" to ascertain if that is, in fact, the case ... and what sort of gear do these ghost hunters use to detect said spirits? Gizmag's (very intrepid) Ben Coxworth decided to find out.